See All Trees and Shrubs
-
ArticlesWinter Injury Observed in Ornamental Plantings
Spring has sprung and while the change is welcome, it is often when problems emerge that gained a foothold last year. -
ArticlesThe Birch Skeletonizer, Bucculatrix Canadensisella Chambers
The birch skeletonizer, Bucculatrix canadensisella, is a native North American moth. The caterpillars skeletonize the leaves of birch trees. -
ArticlesObscure Scale
The armored obscure scale is a key pest of oak in Pennsylvania, and can attack other woody host plants such as beech, dogwood, hickory, maple, and willow. -
ArticlesCooley Spruce Gall Adelgid
The most common host plants of Cooley spruce gall adelgid are Colorado blue spruce and Douglas-fir that are grown as landscape ornamentals and Christmas trees. -
ArticlesOld House Borer
The old house borer is an injurious wood-boring insect. The larva bores through pine, spruce, and other coniferous woods, weakening structural timbers. -
WebinarsFree
Holly Propagation, Selection, and Collections
When 10/08/2026Length 1 hour, 15 minutesEvent Format Virtual | LiveLearn holly propagation, selection, and landscape use, including integrating native plants and steps to become a Certified Holly Arboretum. -
WorkshopsEnvironmental Field Studies: Trees of Pennsylvania
Length 3 hours, 30 minutesLearn to identify common Pennsylvania trees and understand their ecological importance. Explore how thoughtful planting choices can support biodiversity and strengthen local ecosystems. -
ArticlesFall Cankerworm
The fall cankerworm is a native pest of hardwood trees in North America. It causes some defoliation in the forest every year, with larger outbreaks occasionally. -
ArticlesTuliptree Scale
The tuliptree scale is a pest of yellow poplar, or tuliptree, magnolia, and linden. This soft scale insect is so prolific that it can cover twigs and branches. -
WebinarsFree
Hidden Canopies: Exploring Underutilized Trees and Shrubs
When 09/09/2026Length 1 hour, 15 minutesEvent Format Virtual | LiveExplore underutilized trees and shrubs and learn practical strategies to enhance landscapes, support biodiversity, and promote sustainable production systems. -
Webinars$10.00
Oak Wilt, Bacterial Leaf Scorch, or Something Else?
When 06/29/2026Length 1 hour, 15 minutesEvent Format Virtual | LiveLearn to identify oak wilt, bacterial leaf scorch, and other common issues. Gain practical skills in diagnosis, sampling, and management to support effective oak health decisions. -
ArticlesHome Fruit Plantings: Gooseberry and Currant Variety Selection
Several varieties of currants and gooseberries are available and described below. Only varieties of black currants with good resistance to white pink blister rust are included. -
Workshops$150.00
Pesticide Applicator Short Course
When 09/21/2026Length 5 optional daysEvent Format In-PersonPrepare for the Pennsylvania Department of Agriculture’s certified pesticide applicator exam while learning safe, effective, and environmentally responsible pesticide use practices. -
ArticlesPhomopsis Canker and Twig Blight in Blueberries in Home Fruit Plantings
Phomopsis twig blight and canker is a very common fungal disease in plantings. In addition to causing a twig blight and cankers, the fungus also causes leaf spots and a fruit rot. -
ArticlesCranberry Fruitworm on Blueberries
The cranberry fruitworm, Acrobasis vaccinii (Riley), is found throughout the eastern United States wherever wild blueberries grow and can damage cultivated crops. -
ArticlesBlueberry Variety Selection in the Home Fruit Planting
Blueberry varieties can be selected so that you have crops to be harvested from July through mid-September, if desired. -
ArticlesPlum Curculio in Home Blueberry Plantings
The plum curculio is dark brown, 1/4 inch long, and has four humps on its back and a long (one-third of the body length) snout projecting forward and downward from its head. -
ArticlesBlack Root Rot on Strawberries in Home Fruit Plantings
Black root rot a "disease complex," meaning that it can be caused by various pathogens combined with environmental stresses. -
ArticlesCrown Gall and Cane Gall in the Home Fruit Planting
Crown and cane gall are bacterial diseases with no cure that constrain plant vigor and can cause plant death. -
VideosTree of Heaven: Native Look-alikes
Length 5:06Learn the identification characteristics of the invasive tree-of-heaven and be able to distinguish it from the native look-alikes, black walnut and staghorn sumac. -
ArticlesBrambles in the Home Fruit Planting
Red, black, and purple raspberries, as well as blackberries, are easy to grow in the home garden. -
ArticlesSooty Blotch and Flyspeck of Apples in the Home Fruit Planting
Sooty blotch and flyspeck of apple are separate diseases affecting apple, crabapple, and pear trees. Oftentimes, both diseases are present on the same fruit. -
ArticlesPlum Curculio in the Home Fruit Planting
Climatic irregularities govern the activities of the plum curculio, Conotrachelus nenuphar, a pest injurious to pome and stone fruits throughout the state. -
ArticlesLesser Peachtree Borer in the Home Fruit Planting
Lesser peachtree borer is almost always associated with widespread incidence of Cytospora canker and, to a much lesser extent, pruning wounds, winter injury, and mechanical damage. -
ArticlesJapanese Beetles in Home Fruit Plantings of Peaches
The Japanese beetle, Popillia japonica, is often the most important pest of tree-ripened peaches and can cause severe damage to other important crops.


